/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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package org.hisp.dhis.tracker.imports.validation.validator.relationship;

import static org.hisp.dhis.tracker.imports.validation.ValidationCode.E4015;
import static org.hisp.dhis.tracker.imports.validation.ValidationCode.E4016;
import static org.hisp.dhis.tracker.imports.validation.ValidationCode.E4017;

import org.hisp.dhis.tracker.imports.TrackerImportStrategy;
import org.hisp.dhis.tracker.imports.bundle.TrackerBundle;
import org.hisp.dhis.tracker.imports.domain.Relationship;
import org.hisp.dhis.tracker.imports.validation.Reporter;
import org.hisp.dhis.tracker.imports.validation.Validator;

/**
 * @author Morten Svanæs <msvanaes@dhis2.org>
 */
class ExistenceValidator implements Validator<Relationship> {
  @Override
  public void validate(Reporter reporter, TrackerBundle bundle, Relationship relationship) {

    org.hisp.dhis.relationship.Relationship existingRelationship =
        bundle.getPreheat().getRelationship(relationship.getRelationship());
    TrackerImportStrategy importStrategy = bundle.getStrategy(relationship);

    validateRelationshipNotDeleted(reporter, existingRelationship, relationship);
    validateRelationshipNotUpdated(reporter, existingRelationship, relationship, importStrategy);
    validateNewRelationshipNotExistAlready(
        reporter, existingRelationship, relationship, importStrategy);
    validateUpdatedOrDeletedRelationshipExists(
        reporter, existingRelationship, relationship, importStrategy);
  }

  private void validateRelationshipNotDeleted(
      Reporter reporter,
      org.hisp.dhis.relationship.Relationship existingRelationship,
      Relationship relationship) {
    reporter.addErrorIf(
        () -> existingRelationship != null && existingRelationship.isDeleted(),
        relationship,
        E4017,
        relationship.getRelationship());
  }

  private void validateRelationshipNotUpdated(
      Reporter reporter,
      org.hisp.dhis.relationship.Relationship existingRelationship,
      Relationship relationship,
      TrackerImportStrategy importStrategy) {
    reporter.addWarningIf(
        () ->
            existingRelationship != null
                && !existingRelationship.isDeleted()
                && importStrategy.isUpdate(),
        relationship,
        E4015,
        relationship.getRelationship());
  }

  private void validateNewRelationshipNotExistAlready(
      Reporter reporter,
      org.hisp.dhis.relationship.Relationship existingRelationship,
      Relationship relationship,
      TrackerImportStrategy importStrategy) {
    reporter.addErrorIf(
        () ->
            existingRelationship != null
                && !existingRelationship.isDeleted()
                && importStrategy.isCreate(),
        relationship,
        E4015,
        relationship.getRelationship());
  }

  private void validateUpdatedOrDeletedRelationshipExists(
      Reporter reporter,
      org.hisp.dhis.relationship.Relationship existingRelationship,
      Relationship relationship,
      TrackerImportStrategy importStrategy) {
    reporter.addErrorIf(
        () -> existingRelationship == null && importStrategy.isUpdateOrDelete(),
        relationship,
        E4016,
        relationship.getRelationship());
  }

  @Override
  public boolean needsToRun(TrackerImportStrategy strategy) {
    return true;
  }
}
